I found this today on Ebay. It bolts in under the generator cover to the rear of the generator. So it's independent of the bikes normal electrical system. I really think this maybe the extra electrical generation for lighting alot of ppl have been looking for. The second link show some extra stuff including a ac to dc converter for it to charge "on the bike" battery packs. This really opens up alot of possiblities.
SUPER DEAL Mini-Generator With LED Light Motorized Bike - eBay (item 400057342055 end time Oct-19-09 21:22:35 PDT)
2d link: eBay Store - WONDERFUL CREATIONS STORE: Coming Features
Could somebody who knows more than I about the generator electrical output comment on this? If you look at the pic this thing is just a extra coil taking advantage of the existing generator frame. Would this boost the primary coil output or have no effect on the primary?